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Don't treat negative trait predicates as always knowable

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This commit is contained in:
Michael Goulet 2023-07-26 01:35:51 +00:00
parent 864bdf7843
commit 808e174dfc
1 changed files with 1 additions and 1 deletions
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2
compiler/rustc_trait_selection/src/traits/select/mod.rs
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@ -1487,7 +1487,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
fn is_knowable<'o>(&mut self, stack: &TraitObligationStack<'o, 'tcx>) -> Result<(), Conflict> {
debug!("is_knowable(intercrate={:?})", self.is_intercrate());
if !self.is_intercrate() || stack.obligation.polarity() == ty::ImplPolarity::Negative {
if !self.is_intercrate() {
return Ok(());
}